import com.learn.tools.ProgramStruct;
public class Main {
    public static void main(String[] args) {
        System.out.println("Hello Java");
        System.out.println("Java版本："+System.getProperty("java.version"));
        System.out.println("Java_Home："+System.getProperty("java.home"));
        System.out.println("操作系统："+System.getProperty("os.name"));

        System.out.print(new ProgramStruct());
    }
}